In-depth analysis of the fit of precision ball bearings-

Precision ball bearings must be positioned and fixed differently in axial/axial and radial directions when mating with shafts and bearing housings. The axial precise positioning of the bearing is generally completed by the nut, the collar, the bearing end cover, the spacer, the elastic ring and the port of the adjacent parts. The axial and axial precise positioning of the bearing is generally completed by the cooperation between the inner diameter of the bearing and the shaft, and the diameter and the inner hole of the bearing. For high-speed precision spindle bearings, in order to ensure their excellent dimensional accuracy and rotational accuracy, excessive clearance fit should be prevented to avoid ring throwing deformation due to large interference, resulting in loss of bearing accuracy. On the other hand, for high-speed bearings with a dmn value exceeding 1.0X10 6mm.r/min, if the inner ring and the shaft do not fit properly, when the bearing is running at high speed, the inner ring will expand outward due to the effect of centripetal force, resulting in a gap between the inner ring and the shaft. The expansion of the gap may cause friction and damage between the inner ring and the mating shaft. Therefore, special attention must be paid to the coordination of high-speed precision spindle bearings. Only when the torque is accurate can the rotation be stable! This article is from Co., Ltd., a precision bearing manufacturer for 37 years. Please indicate the source and link for reprinting (http:// )

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